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Motor Oil Test and Comparison

AMSOIL vs. Mobil 1

409,000-Miles Without An Oil Change

AMSOIL Excels in API Sequence IIIF Performance Test

Motor Oil Performance Tests & Comparisons

Temperature Extremes Call For Superior Motor Oils

Why Harley-Davidson Owners Choose AMSOIL

Synthetic Motorcycle Oil & Harley-Davidson Warranty Issues

AMSOIL Synthetic Gear Lube Outperforms Valvoline Gear Lube

8.2% More MPG With AMSOIL Synthetic Lubricants

AMSOIL Proves Superior In Clark County Field Test

AMSOIL Series 3000 Synthetic 5W-30 Heavy Duty Diesel Oil is Correct Choice for Jeff Foster Trucking

AMSOIL Products Improve Efficiency and Reduce Operating Costs for Gerlach Trucking

What is the Noack Volatility Test?

What is the Four-Ball Wear Test?

What is TBN?


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AMSOIL Field Study Proves Quality of AMSOIL Synthetic 15W-40 Diesel and Marine Oil

In order to test the performance capabilities of AMSOIL Synthetic 15W-40 Heavy Duty Diesel and Marine Oil (AME), AMSOIL sought a partner with a fleet that operated in truly severe conditions. The perfect match was found in Duluth, Minnesota based Nordic Waste. Nordic Waste operated a fleet of 10 International refuse haulers, providing trash and recycling pickup to residential and commercial customers in the greater Duluth/Superior Wisconsin region. Nordic's trucks operate in the bitter cold of sub-zero winters, as well as on humid summer days that can top out at over 90 degrees F. The fleet runs 12 hours a day with frequent stops and redlined starts, all while hauling up to 22,000 pounds of refuse and navigating the seriously steep hills of Duluth.

As if the geographic challenges aren't enough, perhaps the greatest strain a refuse hauler's engine faces is dumping the refuse. This action requires the engine to remain near or above redline throughout the process and shakes the truck enough to nearly lift the front tires off the ground. Nordic's trucks dump their contents twice daily, challenging the oil's shear stability on a regular basis.

Nordic Waste International 7400 Rear Loading Refuse Hauler With Navistar DT466 Diesel Engine - AMSOIL 15W-40 Synthetic Diesel Oil Outperformed Shell Rotella T 15W-40 Diesel OilThe truck used in this study is a 2006 International 7400 rear-loading refuse hauler. This particular truck was chosen because its Navistar DT466 engine employs a hydraulically actuated, electronically controlled unit injector (HEUI) that uses engine oil pressure to inject diesel fuel into the combustion chamber. HEUI systems feature a variable pump (in addition to the oil pump) that pressurizes the oil according to the fuel injection system's needs, placing a considerable amount of additional strain on engine oil. HEUI systems can raise oil pressure to as high as 3,500 psi, creating great potential for shearing and adding significant stress to motor oil that is already operating in a severe environment. The HEUI system's reputation for shearing less robust motor oils made the DT466 engine the perfect choice for testing the durability of AMSOIL Heavy Duty Diesel and Marine Oil.

983 Hour Drain Interval

Nordic Waste initially installed Shell Rotella T 15W-40 Motor Oil (239 hours). AMSOIL Synthetic 15W-40 Diesel and Marine Oil was installed for the subsequent service interval and monitored via oil analysis. AMSOIL Diesel and Marine Oil provided 983 hours of service before oil analysis indicated it was time to drain the oil. As expected, the results revealed that AMSOIL Diesel Oil contained wear metals well below International's published condemnation limits, even after nearly 1,000 hours of service.

Routine Teardown

At approximately 8,000 hours of use, Nordic Waste brought its International 7400 refuse hauler to a certified International Truck mechanic for a routine teardown. The engine was virtually free of deposits, displayed minimal wear and received high praise from the mechanic who performed the inspection.

Use of AMSOIL Diesel Oil Saves Money

Nordic Waste save a considerable amount of money just by using AMSOIL Synthetic Diesel and Marine Oil rather than a conventional petroleum product. The company has used inferior products in the past, and its search for a high performance lubricant that could withstand the punishment its fleet delivered led it to AMSOIL.

"With the big hills, high heat and extreme cold we work in, nothing has performed better," said Nordic Waste Owner Brian Johnson. Prior to discovering AMSOIL, the conventional lubricants Nordic used would shear out of viscosity grade rapidly and need to be changed at approximately 200 hours of service. Upon switching to AMSOIL Synthetic 15W-40 Diesel and Marine Oil, Nordic Waste increased the average drain interval for its trucks from approximately 200 hours to nearly 1,000 hours. In addition, Nordic's use of AMSOIL Diesel Oil means the company’s trucks are well protected and run at optimum fuel economy, so they stay out of the shop and on the road.

"We experience less downtime and have seen reductions in costs associated with engine overhauls and replacement parts," said Johnson. "We buy significantly less oil, fewer filters and we experience lower labor costs. Our biggest savings have been the reduced number of engine overhauls and replacement parts."

Use of AMSOIL Synthetic 15W-40 Diesel and Marine Oil saves Nordic Waste thousands of dollars in oil alone, in addition to reduced expenses for labor, filters and waste oil and used filter disposal.

Read More: AMSOIL 15W-40 Synthetic Diesel and Marine Oil Field Study Nordic Waste Refuse Hauler

AMSOIL Refuse Hauler Fleet Field Study Brochure Now Available

The refuse hauler field study is covered in greater detail in the AMSOIL Refuse Hauler Fleet Field Study Brochure (G2695). Eight pages and full color, this brochure shows the advantages of AMSOIL Synthetic Diesel Oils.

Why is AMSOIL Synthetic Oil Better?

Watch this Informative Video

Nordic Waste International 7400 Rear Loading Refuse Hauler With Navistar DT466 Diesel Engine - AMSOIL 15W-40 Synthetic Diesel Oil Outperformed Shell Rotella T 15W-40 Diesel Oil

Premium AMSOIL Synthetic Motor Oils offer the longest drain intervals on the market, unsurpassed protection and performance that effectively extends equipment life and improved fuel economy, saving customers money at the pump and reducing the nation's dependence on foreign oil.

"AMSOIL INC. warrants that the use of its lubricants will not cause mechanical damage to any mechanically sound equipment when AMSOIL INC. products are used in full compliance with the company's recommendations and instructions."


AMSOIL synthetic motor oils are formulated to surpass engine test specifications, offering protection far greater than competing motor oils for extended drain intervals. Most synthetic oil manufacturers make no claim to extended drain intervals, deferring to the maintenance schedule provided by the vehicle manufacturer. With its unparalleled oil and warranty program, AMSOIL offers consumers unprecedented protection and economics.

Another AMSOIL First

More than 20 years ago, AMSOIL began using the NOACK volatility test as a comparison tool and measurement of quality. Back then, nearly every oil tested side-by-side with AMSOIL synthetic motor oils failed, and those that passed barely squeaked by. Other oil companies paid no attention to NOACK results until Ford Motor Company made it a requirement for service fill oils, validating what AMSOIL had said all along.

THE NOACK Volatility Test
The NOACK Volatility Test determines the evaporation loss of lubricants in high temperature service. The more motor oils vaporize, the thicker and heavier they become, contributing to poor circulation, reduced fuel economy and increased oil consumption, wear and emissions. AMSOIL Synthetic Motor Oil resists high temperature volatization better than other motor oils. AMSOIL Synthetic Motor Oil maintains peak fuel efficiency and reduces oil consumption and emissions.

AMSOIL Now An ISO Certified Manufacturer
AMSOIL recently received ISO 9001:2000 certification of our Quality Management System (QMS). NSF International Strategic Registrations is the registrar that has verified our QMS meets the requirements of the ISO 9001:2000 standard, the most widely utilized quality standard throughout the world for quality management systems. ISO standards are used by over 300,000 companies worldwide setting rigorous standards for businesses, government and industry.

ISO 9001:2000 is applicable to any manufacturing and service organization providing a framework for system development that focuses on the customer, quality system performance and ongoing improvement. AMSOIL received ISO 9001:2000 registration under the scope: synthetic lubricants blending, packaging, and other fulfillment directly associated with lubricant product.

The ISO certification puts AMSOIL in line with some of the most efficient companies in the world. It is further assurance that the products and services AMSOIL provides will continue to maintain the high level of quality the company always demanded.

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